Benefits of the DTSS

Ensuring sustainability of NEWater

The Deep Tunnel Sewerage System (DTSS) is an important component of Singapores water management strategy as it allows every drop of used water to be collected, treated and further purified into NEWater, Singapores own brand of reclaimed water.

NEWater is the pillar of Singapores water sustainability. Together with three other sources water from local catchments, imported water and desalinated water they form the Four National Taps, PUBs long-term water supply strategy to ensure a robust and sustainable supply of water for Singapore.

Singapore’s largest NEWater plant to date is built on the rooftop of the Changi Water Reclamation Plant, the first of its kind in the world. Integrating the NEWater plant with the DTSS allows for efficient, large-scale water recycling, thus ensuring the sustainability of NEWater.

Opened in May 2010, this NEWater plant at Changi has a capacity of 50mgd. With this addition, coupled with the expansion of the existing three NEWater plants, NEWater now meets 30% of Singapore’s total water demand.

Compact design and efficient land use

The compact design of the Changi Water Reclamation Plant (Changi WRP) requires only one-third the land area of a conventional plant. There is also no need for a buffer zone, as the plant modules are fully covered.

Phase 1 of the DTSS replaces three of the existing water reclamation plants and accompanying pumping stations, freeing up to 135ha of land for other developments.

Growing Singapores industry capabilities

Over 300 local and international contractors, subcontractors and suppliers have worked on the construction of the DTSS. The experience enabled them to build their track record and pitch for bigger projects in Singapore and overseas.